Cushion



FIG. 1 is a perspective view of the front side and a left hand side of a cushion showing my new design;

FIG. 2 is top view of the cushion shown in FIG. 1, with the bottom view being identical to the top view;

FIG. 3 is front elevation of the cushion shown in FIG. 1, with the rear elevation being identical to the front elevation; and,

FIG. 4 is right hand side elevation thereof of the cushion shown in FIG. 1, with the left hand side elevation being identical to the right hand side elevation. 

CLAIM The ornamental design for a cushion, substantially as shown and described. 